Polymerization catalysts, preparation of polyolefins, organotransition metal compounds and ligands
US7589223B2 · kind B2 · utility
29Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2004 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Sep 16, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to non-metallocene catalyst systems useful for preparing olefin homopolymers or copolymers. The catalyst systems comprise a cocatalyst and a Group 3-10 transition metal compound that incorporates a diimine ligand in which sp2-hybridized carbons of the imine groups are joined by a specific divalent one- or two-membered bridge (Y) comprising nitrogen and/or oxygen. The invention includes the diimine ligands, the transition metal compounds, the catalyst systems, and processes for making the ligands, transition metal compounds, catalyst systems, and olefin homopolymers or copolymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.